package com.sdau.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sdau.reggie.dto.DishDto;
import com.sdau.reggie.entity.Dish;
import com.sdau.reggie.entity.DishFlavor;
import com.sdau.reggie.mapper.DishMapper;
import com.sdau.reggie.service.DishFlavorService;
import com.sdau.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish>
        implements DishService {


    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品，同时插入菜品对应的口味数据，需要操作两张表，dish,dish_flavor
     *
     * @param dishDto
     */
    @Override
    @Transactional //开启事务注解------------因为操作了多张表
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品基本信息到菜品表dish
        this.save(dishDto);

        //获得菜品id
        Long dishId = dishDto.getId();

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);


        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(lqw);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     * 新菜品信息，同时更新对应的口味信息
     *
     * @param dishDto
     */
    @Override
    @Transactional  //操作了两张表 dish和dish_flavor
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表的基本信息--------传子类也OK的
        this.updateById(dishDto);

        //清理当然菜品对应的口味数据-----dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(lqw);

        //添加当前提交过来的口味数据------dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);


    }
}
